Unit test for fdo#79941 (handle short reads)

...done as a subsequentcheck as doing it as a BootstrapFixtureBase (which is the
easiest way) makes it depend on later modules in the dependency chain.

Change-Id: I9588bae409b38aa373ccfa855042f598b6e2bb2b

io/CppunitTest_io_textinputstream.mk

@@ -0,0 +1,27 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+$(eval $(call gb_CppunitTest_CppunitTest,io_textinputstream))
+
+$(eval $(call gb_CppunitTest_add_exception_objects,io_textinputstream, \
+    io/qa/textinputstream \
+))
+
+$(eval $(call gb_CppunitTest_use_libraries,io_textinputstream, \
+    cppu \
+    cppuhelper \
+    sal \
+    unotest \
+))
+
+$(eval $(call gb_CppunitTest_use_udk_api,io_textinputstream))
+
+$(eval $(call gb_CppunitTest_use_ure,io_textinputstream))
+
+# vim: set noet sw=4 ts=4:

io/Module_io.mk

@@ -13,4 +13,8 @@ $(eval $(call gb_Module_add_targets,io,\
     Library_io \
 ))
 
+$(eval $(call gb_Module_add_subsequentcheck_targets,io,\
+    CppunitTest_io_textinputstream \
+))
+
 # vim:set noet sw=4 ts=4:

io/qa/textinputstream.cxx

@@ -0,0 +1,148 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstring>
+#include <exception>
+
+#include "com/sun/star/io/BufferSizeExceededException.hdl"
+#include "com/sun/star/io/IOException.hdl"
+#include "com/sun/star/io/NotConnectedException.hdl"
+#include <com/sun/star/io/TextInputStream.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/io/XTextInputStream2.hpp>
+#include "com/sun/star/uno/Sequence.hxx"
+#include <com/sun/star/uno/Reference.hxx>
+#include "com/sun/star/uno/RuntimeException.hdl"
+#include <cppuhelper/implbase1.hxx>
+#include <cppunit/TestAssert.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+#include <osl/mutex.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <unotest/bootstrapfixturebase.hxx>
+
+namespace {
+
+class Input: public cppu::WeakImplHelper1<css::io::XInputStream> {
+public:
+    Input(): open_(true), index_(0) {}
+
+private:
+    virtual ~Input() {}
+
+    sal_Int32 SAL_CALL readBytes(css::uno::Sequence<sal_Int8> &, sal_Int32)
+        throw (
+            css::io::NotConnectedException,
+            css::io::BufferSizeExceededException, css::io::IOException,
+            css::uno::RuntimeException, std::exception)
+        SAL_OVERRIDE
+    { CPPUNIT_FAIL("readLine is supposed to call readSomeBytes instead"); }
+
+    sal_Int32 SAL_CALL readSomeBytes(
+        css::uno::Sequence<sal_Int8 > & aData, sal_Int32 nMaxBytesToRead)
+        throw (
+            css::io::NotConnectedException,
+            css::io::BufferSizeExceededException, css::io::IOException,
+            css::uno::RuntimeException, ::std::exception) SAL_OVERRIDE
+    {
+        assert(nMaxBytesToRead >= 0);
+        osl::MutexGuard g(mutex_);
+        checkClosed();
+        assert(index_ >= 0 && index_ <= SIZE);
+        sal_Int32 n = std::min<sal_Int32>(
+            std::min<sal_Int32>(nMaxBytesToRead, 2), SIZE - index_);
+        assert(n >= 0 && n <= SIZE - index_);
+        aData.realloc(n);
+        std::memcpy(aData.getArray(), data + index_, n);
+        index_ += n;
+        assert(index_ >= 0 && index_ <= SIZE);
+        return n;
+    }
+
+    void SAL_CALL skipBytes(sal_Int32 nBytesToSkip)
+        throw (
+            css::io::NotConnectedException,
+            css::io::BufferSizeExceededException, css::io::IOException,
+            css::uno::RuntimeException, std::exception) SAL_OVERRIDE
+    {
+        assert(nBytesToSkip >= 0);
+        osl::MutexGuard g(mutex_);
+        checkClosed();
+        assert(index_ >= 0 && index_ <= SIZE);
+        index_ += std::min<sal_Int32>(nBytesToSkip, SIZE - index_);
+        assert(index_ >= 0 && index_ <= SIZE);
+    }
+
+    sal_Int32 SAL_CALL available()
+        throw (
+            css::io::NotConnectedException, css::io::IOException,
+            css::uno::RuntimeException, std::exception) SAL_OVERRIDE
+    {
+        osl::MutexGuard g(mutex_);
+        checkClosed();
+        assert(index_ >= 0 && index_ <= SIZE);
+        return SIZE - index_;
+    }
+
+    void SAL_CALL closeInput()
+        throw (
+            css::io::NotConnectedException, css::io::IOException,
+            css::uno::RuntimeException, std::exception) SAL_OVERRIDE
+    {
+        osl::MutexGuard g(mutex_);
+        checkClosed();
+        open_ = true;
+    }
+
+    void checkClosed() {
+        if (!open_) {
+            throw css::io::NotConnectedException(
+                "test input stream already closed");
+        }
+    }
+
+    static sal_Int32 const SIZE = 9;
+    static char const data[SIZE];
+
+    osl::Mutex mutex_;
+    bool open_;
+    sal_Int32 index_;
+};
+
+char const Input::data[] = { '1', '2', '3', '4', '5', '6', '7', '8', '9' };
+
+class Test: public test::BootstrapFixtureBase {
+private:
+    CPPUNIT_TEST_SUITE(Test);
+    CPPUNIT_TEST(testReadLine);
+    CPPUNIT_TEST_SUITE_END();
+
+    void testReadLine();
+};
+
+void Test::testReadLine() {
+    css::uno::Reference<css::io::XTextInputStream2> s(
+        css::io::TextInputStream::create(getComponentContext()));
+    s->setInputStream(new Input);
+    rtl::OUString l(s->readLine());
+    CPPUNIT_ASSERT_EQUAL(rtl::OUString("123456789"), l);
+}
+
+CPPUNIT_TEST_SUITE_REGISTRATION(Test);
+
+}
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */